Constant-round authenticated and dynamic group key agreement protocol for D2D group communications

The device-to-device (D2D) communication exhibits its potential capacity in the next generation of mobile communication networks and wireless systems (5G). One of the most important applications of D2D is to form a group of registered devices without the help of the existing base stations and extend the network-absent D2D communications network. There have been couple of great works on security and privacy in D2D communications, however, they are short of secure and privacy-preserving D2D group communications that would cause serious restrictions on their widespread usage. Hence, how to realize the mutual communication without the help of the third-party devices is a big challenge for D2D group communications. In this paper, a dynamic group key agreement protocol is proposed to realize communication concentrating on security and privacy by establishing a constant-round authentication in D2D group communications. In this new protocol, the D2D users communicate with each other without NodeB (eNB) or basic stations, while securely consulting a common D2D group session key mutually. In addition, a formal computational and communication overhead to show its security and feasibility is also processed. Finally, the evaluation of security and feasibility of our protocol shows that the proposed scheme is applicable to the performance requirements of D2D group communications. (C) 2019 Published by Elsevier Inc.